Permutation-lock



(No ModelQ J.,H. 8v T. D. MORRIS.

. PERMUTATION LOGK.

Patented Nov. 12, 1889.

UNITED STATES PATENT ()FFICE.

JOHN H. MORRIS AND THOMAS D. MORRIS, ()FSEWVARD, NEBRASKA.

PERMUTATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 414,985, dated November 12, I889.

Application filed March 2'7, 1889.

1 To all whom it may concern.-

' plan view with the rear plate Be it known that we, JOHN H. MORRIS and THoMAs D. Mourns, citizens of the United States, residing at Seward, in the county of Seward and State of Nebraska,have invented a new and useful Improvement in Combination-Locks, of which the following is a clear, full, and exact description, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a face view of the lock, showing the latch in position. Fig. 2 is a rear thrown open, showing the tumblers and sliding bolt.- Fig. 3 is a perspective view of the latch detached. Fig. 4 is a perspective view of the sliding bolt.

Our invention relates to that class of locks which depend upon a combination of devices in order to be released or unfastened; and it consists in a combination of elements hereinafter described and claimed.

To enable others skilled in the art to make and use our invention, we will proceed to describe the exact manner in which we have carried it out.

In the drawings, A represents the body of our lock.

B is the dial, C the knob, and D the sliding bolt. The knob is made large, with a view to its being easily grasped with the fingers, and it is made fiat to avoid liability of being broken off when attached to a box or trunk. The rim of the knob is slightly raised and notched, with a view to greater convenience in turning the dial. Around the periphery of the knob we make several small holes a for the reception of a suitable wrench, by which the combination may be set or changed without opening the lock or removing the screws or other fasteners. The notched wheel E is secured to the center of the knob by means of the two screws 1) b and a washer c. It is evident that if the wheel were held by a single screw to the center of the knob the wheel would be liable to be tightened or loosened as the screw turned.

On one side of the face of the notched wheel or tumbler E we loosely pivot a fourpointed'wheel d. The wheel is provided with a slot precisely corresponding with .the slot in the notched wheel, and when these two slots are brought into alignment, as shown in Fig. 2, the bolt of the lock can be readily drawnback and the fastening released.

Serial No. 304,933. (No model.)

Let us suppose the lock is set to open on the letter A of the dial. If the bolt will not slide back by moving knob K when A is turned to the opening-point e on the dial, turn the dial once around to the right with the long mark to the left of A on the opening-point e, and then turn A back to the opening-point. Now try the bolt, and if it. does not slide back repeat the operation, turning the dial to the right. In four turns of the dial (or less) the bolt will move, 01)- serving each' time to turn the long mark on theleft of the letterA on the dial to the opening-point e, and then turn the letter A back to the opening-point. The action of the bolt on the four-pointed wheel 01 turns it one- -quarter round at each turn of the dial,'and

hence four turns of the dial must bring the slots into line if the forward and backward movement of the opening-letter be observed. Another essential feature of our invention is the hinged casing F, by which we are enabled to open, examine, and close our look without the use of screws or other ordinary fastenings.

The latch G is pivoted at f in any suitable manner to the framework, and is slotted on the opposite bent end to receive the bolt- D, while a screw passed through the intermediate slot 9 allows the latch to be moved out of the way of the bolt, and thus avoid the accidental locking of the door.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is I 1. In a combination-lock, the dial B and flat knob having a raised notched rim and provided with a plural number of holes a, in combination with thenotohed wheel or tumbler E, secured to the inner end of the knob C in the manner set forth, and with the wheel d, pivoted to the face of said tumbler E, as and for the purpose described. a

2. In a combination lock, the notched wheel or tumbler E, in combination with the slotted and pointed wheel d,,pivoted to the face of said tumbler, and sliding bolt D, all constructed and arranged substantially as set forth.

JOHN H. MORRIS.

THOMAS D. MORRIS.

\Vitnesses R. P. ANDERSON, H. TERWILLIGER. 

